The Padre Canyon Trail in the Red Cliffs Desert Reserve can be done as a 7 mile loop that passes through Snow Canyon State Park. Walking down from the pass, the trail intersects with the Three Pools trail. The loop is connected by a 1 mile connector trail at the Johnson Canyon parking lot, but this trail is closed from March thru September so the loop can only be done in winter, unless you climb over the mountain, which is also possible. Sound confusing? You can always just go up to the pass and back.